{Reference Type}: Case Reports {Title}: Durable Response in Relapsed Adolescent Peripheral T-cell Lymphoma: A Case Report and Review of the Literature. {Author}: Wedekind MF;Saraf A;Willen F;Audino AN; {Journal}: J Pediatr Hematol Oncol {Volume}: 44 {Issue}: 1 {Year}: 01 2022 1 {Factor}: 1.17 {DOI}: 10.1097/MPH.0000000000002147 {Abstract}: Peripheral T-cell lymphoma (PTCL) is an aggressive tumor, rarely seen in pediatrics or adolescent and young adults (AYAs) so there is no upfront or relapsed standard of care. The authors describe a 16-year-old with PTCL, treated with chemotherapy and autologous stem cell transplant. Upon relapse, he received ifosfamide, carboplatin, etoposide, and radiation with durable remission of 4 years. Data in pediatric/AYA PCTL continue to lack an understanding of the biology and microenvironment, the differences to adult patients, and a lack of adequate therapy. Targeted therapy may improve outcomes for children and AYAs with refractory or relapsed PTCL.